869288056 has 64 divisors (see below), whose sum is σ = 2011161600. Its totient is φ = 343018368.

The previous prime is 869288053. The next prime is 869288087. The reversal of 869288056 is 650882968.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 869287994 and 869288012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869288053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335775 + ... + 338353.

It is an arithmetic number, because the mean of its divisors is an integer number (31424400).

Almost surely, 2^869288056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869288056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005580800).

869288056 is an abundant number, since it is smaller than the sum of its proper divisors (1141873544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

869288056 is a wasteful number, since it uses less digits than its factorization.

869288056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068 (or 3064 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 869288056 is about 29483.6913564092. The cubic root of 869288056 is about 954.3797974152.

The spelling of 869288056 in words is "eight hundred sixty-nine million, two hundred eighty-eight thousand, fifty-six".